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arXiv · 1104.0117

A phenomenological study of single transverse-spin asymmetry for inclusive light-hadron productions at RHIC

Koichi Kanazawa·Yuji Koike
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Abstract

We study the single transverse-spin asymmetry for inclusive light-hadron productions in the proton-proton collision, $\pphx$ ($h=π,K,η$), for the RHIC kinematics based on the twist-3 mechanism in the collinear factorization. The analysis includes all the contributions from the soft-gluon pole and the soft-fermion pole for the twist-3 quark-gluon correlation functions in the transversely polarized proton. After discussing the flavor decomposition and the $P_T$-dependence of the asymmetry obtained in the previous analysis at the center-of-mass energy $\sqrt{S}=62.4$ and 200 GeV, we will give a prediction for the asymmetry at $\sqrt{S}=500$ GeV and also for the $η$-meson production. We found slightly smaller asymmetry at $\sqrt{S}=500$ GeV for $π^{\pm,0}$ and $K^+$ compared with those at the lower energies. The asymmetry for the $η$-meson turned out to be significantly larger than that for $π^0$.

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Koichi Kanazawa, Yuji Koike. 2011-06-11. A phenomenological study of single transverse-spin asymmetry for inclusive light-hadron productions at RHIC. https://doi.org/10.1103/physrevd.83.114024

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